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JOURNALS // Algebra i Analiz // Archive

1991, Volume 3, Issue 5


Expository Surveys
Hadamard's ansatz, its analogues, generalizations and applications
V. M. Babich
1

Research Papers
Representations of bundles of semichained sets and their applications
V. M. Bondarenko
38
Spectral classification of some types of unitary weighted shift operators
A. L. Gromov
62
Complex topological invariants of real algebraic curves on a hyperboloid and an ellipsoid
V. I. Zvonilov
88
The reflection of indices and unconditional bases of exponentials
A. M. Minkin
109
The periodic Fock bundle
Jaak Peetre
135
Топологические характеристики алгебры сингулярных интегральных операторов на окружности с разрывными символами
B. A. Plamenevskii, G. V. Rozenblum
155
A multidimensional local theory of class fields. II
I. B. Fesenko
168
Sums of three squares in imaginary quadratic fields
O. M. Fomenko
190
Banach cyclic (co)homology as Banach derived functors
A. Ya. Helemskii
213
Nonoscillation of linear periodic Hamiltonian equations and related problems
V. A. Yakubovich
229

Book Reviews
R. Penrose. “The emperor's new mind”. Oxford University Press, Oxford etc., 1989, xiii+466 pp.
Yu. V. Matiyasevich
254


© Steklov Math. Inst. of RAS, 2025